Long-Term Clinical Outcomes of Transalveolar Maxillary Sinus Floor Elevation with Rotatory Instruments: An 8-Year Follow-Up Prospective Clinical Study

Abstract

Transalveolar sinus floor elevation (TSFE) is a surgical technique for the placement of dental implants in patients with reduced height of the maxillary posterior alveolar bone. This prospective clinical study followed STROBE guidelines using the minimal invasive sinus elevation (MISE) technique with simultaneous placement of implants. Ninety-one patients (mean age 62.1 ± 11.8 years) were treated with TSFE and 107 implants, with a mean follow-up of 96.2 ± 11.7 months. An increase of 4.3 ± 0.4 mm in bone height was achieved, with a cumulative implant survival rate of 97.2%. Peri-implantitis was observed in 9.3% of implants and membrane perforation occurred in 7.7% of cases. Technical complications were noted in 5.5% of patients. The MISE technique is a successful protocol for the placement of implants in the posterior maxilla with reduced alveolar ridge height, with a rate of biological and prosthetic complications below 10% over an average follow-up of 8 years.